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Old Ninja : UnderWorld
#3968810Old Ninja: Underworld is a 2D pixel-art Metroidvania action game where an aging ninja explores a chaotic underground world. Battle through a bizarre mix of enemies with no apparent connection, strengthen your ninja, and challenge the boss lurking deep below.
Recommendation
ProtonGreat
Needs confirmationLow confidence
Only Proton reports exist so far.
Last report Sep 25, 2025
Compatibility
Proton
Great
Needs confirmationLow confidence
1 report · Low confidence: very few recent reports yet.
NativeNone
No native Linux build — Proton only
Anti-cheatUnknown
No anti-cheat reports yet
Reports(1)
Most of this is historical ProtonDB data (newest from Sep 25, 2025) and needs a fresh report to confirm it still holds.
Add a fresh report